package com.caigou.util;

import org.apache.commons.beanutils.BeanUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

public class BeanMapUtil {
	
	private static Logger log = LoggerFactory.getLogger(BeanMapUtil.class);

    
//    public static void main(String[] args) {
//    	 
//        SecurityUser user = new SecurityUser();
//        Map<String, Object> mp = new HashMap<String, Object>();
//        mp.put("id", 32223);
//        mp.put("userId", "Mike38383");
//        mp.put("tel", "1399999");
//        
//        // 将map转换为bean
//        transMap2Bean(mp, user);
//        System.out.println("--- transMap2Bean Map Info: ");
//        for (Map.Entry<String, Object> entry : mp.entrySet()) {
//            System.out.println(entry.getKey() + ": " + entry.getValue());
//        }
//
//        
//        // 将javaBean 转换为map
//        Map<String, Object> map = transBean2Map(user);
// 
//        System.out.println("--- transBean2Map Map Info: ");
//        for (Map.Entry<String, Object> entry : map.entrySet()) {
//            System.out.println(entry.getKey() + ": " + entry.getValue());
//        }
//        
//}


	
	public static Map<String, Object> transBean2Map(Object obj) {
    	 
        if(obj == null){
            return null;
        }        
        Map<String, Object> map = new HashMap<String, Object>();
        try {
            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
            for (PropertyDescriptor property : propertyDescriptors) {
                String key = property.getName();
 
                // 过滤class属性
                if (!key.equals("class")) {
                    // 得到property对应的getter方法
                    Method getter = property.getReadMethod();
                    Object value = getter.invoke(obj);
 
                    map.put(key, value);
                }
 
            }
        } catch (Exception e) {
            System.out.println("transBean2Map Error " + e);
            log.error("transBean2Map Error " + e, e);
        }
 
        return map;
 
    }


// Map --> Bean 1: 利用Introspector,PropertyDescriptor实现 Map --> Bean
    public static void transMap2Bean(Map<String, Object> map, Object obj) {
 
        try {
            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
 
            for (PropertyDescriptor property : propertyDescriptors) {
                String key = property.getName();
 
                if (map.containsKey(key)) {
                    Object value = map.get(key);
                    // 得到property对应的setter方法
                    Method setter = property.getWriteMethod();
                    setter.invoke(obj, value);
                }
 
            }
 
        } catch (Exception e) {
            System.out.println("transMap2Bean Error " + e);
            log.error("transMap2Bean Error " + e, e);
        }
 
        return;
 
    }

	
	
	// Map --> Bean 2: 利用org.apache.commons.beanutils 工具类实现 Map --> Bean
    public static void transMap2Bean2(Map<String, Object> map, Object obj) {
        if (map == null || obj == null) {
            return;
        }
        try {
            BeanUtils.populate(obj, map);
        } catch (Exception e) {
            System.out.println("transMap2Bean2 Error " + e);
            log.error("transMap2Bean2 Error " + e, e);
        }
    }

}
